The ratio of α-globin mRNA to β-globin mRNA.

(A) Data on α/β mRNA for the various HS −26 genotypes expressed as a percentage of values in normal control mice (set at 100%). Error bars represent 1 SD. (B) Results of RNase protection assay showing expression of mouse α and β mRNAs in peripheral blood from normal, heterozygous floxed, and homozygous floxed mice.